4-(5-hydroxy-6-methyl-2-oxo-4H-pyrido[3,4-d][1,3]oxazin-1-ylmethyl)-benzonitrile 、
3-氰基苄基溴 以gave 4-[5-(3-cyano-benzyloxy)-6-methyl-2-oxo-4H-pyrido[3,4-d][1,3]oxazin-1ylmethyl]-benzonitrile (85) (322 mg, 28% yield) as的产率得到4-[5-(3-cyano-benzyloxy)-6-methyl-2-oxo-4H-pyrido[3,4-d][1,3]oxazin-1ylmethyl]-benzonitrile